Communication of satellite information for non-terrestrial networks

Abstract

This disclosure provides systems, methods and apparatus for communicating a satellite behavior change. In one aspect, a satellite identifies a satellite behavior change to occur for the satellite of a non-terrestrial network for cellular communications. The apparatus also signals the satellite behavior change to a user equipment serviced by the satellite. In another aspect, a user equipment obtains, from a satellite servicing the user equipment, a signaling of a satellite behavior change to occur for the satellite. The user equipment also adjusts one or more user equipment parameters for cellular communication based on the obtained signaling. The satellite behavior change may include a satellite attitude or a transmit power or coverage area of one or more satellite beams. The user equipment parameters may include satellite or beam selection or reselection to listen to paging information, satellite or beam handover parameters, or transmit power control parameters.

What is claimed is: 
     
       1. An apparatus for wireless communications at a satellite of a non-terrestrial network, comprising:
 a processor; 
 memory coupled with the processor; and 
 instructions stored in the memory and executable by the processor to cause the apparatus to: 
 identify a satellite behavior change to occur for the satellite of the non-terrestrial network, wherein the satellite behavior change comprises at least an adjustment of satellite attitude; 
 format an indication of the satellite behavior change to be sent in a dedicated signaling between a user equipment (UE) and the satellite, or in one or more system information blocks (SIBs), or both, wherein the dedicated signaling includes an indication of a start time of the satellite behavior change, a time duration of the satellite behavior change, or both; and 
 signal, by the satellite, the satellite behavior change including at least the adjustment of the satellite attitude to the UE during a threshold period of time before the start time of the satellite behavior change based at least in part on the formatting. 
 
     
     
       2. The apparatus of  claim 1 , wherein the satellite behavior change includes a change in one or more of:
 the satellite attitude; 
 a transmit power of one or more satellite beams; or 
 a coverage area of the one or more satellite beams. 
 
     
     
       3. The apparatus of  claim 1 , wherein signaling the satellite behavior change includes indicating a start location of the satellite behavior change, an end location of the satellite behavior change, or both. 
     
     
       4. The apparatus of  claim 1 , wherein signaling the satellite behavior change includes outputting contents of a vector or table, wherein the contents include a satellite identification and one or more of:
 a satellite attitude adjustment and a time or satellite location associated with the satellite attitude adjustment; 
 a transmit power adjustment and a time or satellite location associated with the transmit power adjustment; or 
 a beam coverage adjustment and a time or satellite location associated with the beam coverage adjustment. 
 
     
     
       5. The apparatus of  claim 1 , wherein the instructions are further executable by the processor to cause the apparatus to:
 restrict signaling of the satellite behavior change to the threshold period of time before the satellite behavior change is to occur. 
 
     
     
       6. The apparatus of  claim 1 , wherein the instructions are further executable by the processor to cause the apparatus to:
 identify one or more neighboring satellite behavior changes to occur for one or more neighboring satellites of the non-terrestrial network; and 
 signal, by the satellite, the one or more neighboring satellite behavior changes along with signaling the satellite behavior change. 
 
     
     
       7. The apparatus of  claim 1 , wherein the instructions are further executable by the processor to cause the apparatus to:
 indicate to the UE, in a SIB1, a scheduling of information for the satellite behavior change to be output. 
 
     
     
       8. The apparatus of  claim 7 , wherein the SIB1 indicates whether the information for the satellite behavior change is to be output periodically by the satellite and one or more parameters of a periodicity of the output. 
     
     
       9. The apparatus of  claim 1 , wherein the one or more SIBs indicate a satellite ephemeris. 
     
     
       10. The apparatus of  claim 1 , wherein the instructions are further executable by the processor to cause the apparatus to:
 restrict outputting information for the satellite behavior change in the one or more SIBS to the threshold period of time before the satellite behavior change is to occur. 
 
     
     
       11. The apparatus of  claim 10 , wherein the instructions are further executable by the processor to cause the apparatus to:
 transmit one or more paging messages to the UE, the one or more paging messages indicating that one or more SIBs including the information for the satellite behavior change are to be output to the UE. 
 
     
     
       12. The apparatus of  claim 1 , wherein the instructions are further executable by the processor to cause the apparatus to signal one or more neighboring satellite behavior changes in the one or more SIBs, wherein:
 the signaling of the satellite behavior change is in a first set of SIBs of the one or more SIBs; and 
 the signaling of the one or more neighboring satellite behavior changes is in a second set of SIBs of the one or more SIBs. 
 
     
     
       13. The apparatus of  claim 1 , wherein the dedicated signaling is sent during a connected mode between the satellite and the UE. 
     
     
       14. A method for wireless communications at a satellite of a non-terrestrial network, comprising:
 identifying a satellite behavior change to occur for the satellite of the non-terrestrial network for cellular communications, wherein the satellite behavior change comprises at least an adjustment of satellite attitude; 
 formatting an indication of the satellite behavior change to be sent in a dedicated signaling between a user equipment (UE) and the satellite, or in one or more system information blocks (SIBs), or both, wherein the dedicated signaling includes an indication of a start time of the satellite behavior change, a time duration of the satellite behavior change, or both; and 
 signaling, by the satellite, the satellite behavior change including at least the adjustment of the satellite attitude to the UE during a threshold period of time before the start time of the satellite behavior change based at least in part on the formatting. 
 
     
     
       15. An apparatus for wireless communications at a user equipment (UE), comprising:
 a processor; 
 memory coupled with the processor; and 
 instructions stored in the memory and executable by the processor to cause the apparatus to: 
 obtain, from a satellite servicing the UE, a signaling of a satellite behavior change that is to occur, including at least an adjustment of satellite attitude and an indication of a start time of the satellite behavior change, a time duration of the satellite behavior change, or both, for the satellite during a threshold period of time before the satellite behavior change is to occur, wherein the satellite is included in a non-terrestrial network, and wherein the satellite behavior change comprises at least the adjustment of satellite attitude; and 
 adjust one or more UE parameters based on the obtained signaling, wherein the one or more UE parameters are associated with satellite or beam selection and reselection, handover of the UE, transmit power control, or any combination thereof. 
 
     
     
       16. The apparatus of  claim 15 , wherein the satellite behavior change comprises one or more of:
 the satellite attitude; 
 a transmit power of one or more satellite beams; or 
 a coverage area of the one or more satellite beams. 
 
     
     
       17. The apparatus of  claim 16 , wherein the signaling of the satellite behavior change includes indicating a start location of the satellite behavior change, an end location of the satellite behavior change, or both. 
     
     
       18. The apparatus of  claim 15 , wherein the satellite behavior change further includes:
 a satellite attitude adjustment and a time or satellite location associated with the satellite attitude adjustment; 
 a transmit power adjustment and a time or satellite location associated with the transmit power adjustment; or 
 a beam coverage adjustment and a time or satellite location associated with the beam coverage adjustment. 
 
     
     
       19. The apparatus of  claim 15 , wherein the instructions are further executable by the processor to cause the apparatus to:
 obtain, from the satellite, signaling of one or more neighboring satellite behavior changes to occur for one or more neighboring satellites of the non-terrestrial network. 
 
     
     
       20. The apparatus of  claim 15 , wherein obtaining the signaling of the satellite behavior change includes obtaining information for the satellite behavior change in one or more system information blocks (SIBs) from the satellite. 
     
     
       21. The apparatus of  claim 20 , wherein the instructions are further executable by the processor to cause the apparatus to:
 obtain an indication, in a SIB1 from the satellite, the information for the satellite behavior change to be obtained. 
 
     
     
       22. The apparatus of  claim 21 , wherein the SIB1 indicates whether the information for the satellite behavior change is to be output periodically by the satellite and one or more parameters of a periodicity of the output. 
     
     
       23. The apparatus of  claim 20 , wherein the obtained information for the satellite behavior change is included in a SIB defined to indicate a satellite ephemeris. 
     
     
       24. The apparatus of  claim 20 , wherein the instructions are further executable by the processor to cause the apparatus to:
 obtain one or more paging messages from the satellite, the one or more paging messages indicating that the one or more SIBs including the information for the satellite behavior change are to be output by the satellite. 
 
     
     
       25. The apparatus of  claim 20 , wherein the instructions are further executable by the processor to cause the apparatus to:
 obtain one or more neighboring satellite behavior changes in the one or more SIBS, wherein the signaling of the satellite behavior change be in a first set of SIBs of the one or more SIBs and the signaling of the one or more neighboring satellite behavior changes be in a second set of SIBs of the one or more SIBs. 
 
     
     
       26. The apparatus of  claim 15 , wherein obtaining the satellite behavior change is in a dedicated signaling between the satellite and the UE. 
     
     
       27. The apparatus of  claim 26 , wherein the dedicated signaling is during a connected mode between the satellite and the UE. 
     
     
       28. A method for wireless communications at a user equipment (UE), comprising:
 obtaining, from a satellite servicing the UE, a signaling of a satellite behavior change that is to occur, including at least an adjustment of satellite attitude and an indication of a start time of the satellite behavior change, a time duration of the satellite behavior change, or both, for the satellite during a threshold period of time before the satellite behavior change is to occur, wherein the satellite is included in a non-terrestrial network, and wherein the satellite behavior change comprises at least the adjustment of the satellite attitude; and 
 adjusting one or more UE parameters based on the obtained signaling, wherein the one or more UE parameters are associated with satellite or beam selection and reselection, handover of the UE, transmit power control, or any combination thereof.